我正在尝试安装包 glmnet。
我收到此错误：
ld: warning: directory not found for option '-L/usr/local/gfortran/lib/gcc/x86_64-apple-darwin15/6.1.0'
ld: warning: directory not found for option '-L/usr/local/gfortran/lib'
ld: library not found for -lgfortran
我安装了自制软件。然后通过 gcc fortran 走到这一步。
我发现许多帮助链接都说类似的话：
您将需要更改您的编译语句~/.R/Makevars到海湾合作委员会使用：
VER=-5.3.0
CC=gcc$(VER)
CXX=g++$(VER)
CFLAGS=-mtune=native -g -O2 -Wall -pedantic -Wconversion
CXXFLAGS=-mtune=native -g -O2 -Wall -pedantic -Wconversion
FLIBS=-L/usr/local/Cellar/gcc/5.3.0/lib/gcc/5
我找不到~/.R/Makevars在我的Mac上！！我有 macOS Catalina 10.15.1。
我找到了两个 Makevars 文件。它们链接到 Rcpp 并且与上面列出的代码完全没有相似之处。
很抱歉这个看似基本的问题，但两个小时后我找不到任何相关的内容~/.R/Makevars.
这是我找到的一份文件的内容：
## With R 3.1.0 or later, you can uncomment the following line to tell R to
## enable compilation with C++11 (where available)
##
## Also, OpenMP support in Armadillo prefers C++11 support. However, for wider
## availability of the package we do not yet enforce this here. It is however
## recommended for client packages to set it.
##
## And with R 3.4.0, and RcppArmadillo 0.7.960.*, we turn C++11 on as OpenMP
## support within Armadillo prefers / requires it
CXX_STD = CXX11
PKG_CXXFLAGS = $(SHLIB_OPENMP_CXXFLAGS)
PKG_LIBS = $(SHLIB_OPENMP_CXXFLAGS) $(LAPACK_LIBS) $(BLAS_LIBS) $(FLIBS)
但这与 RcppArmadillo 有关。
我已经读过这些（甚至更多）很多遍：
- https://cran.r-project.org/bin/macosx/RMacOSX-FAQ.html#Installation-of-source-packages https://cran.r-project.org/bin/macosx/RMacOSX-FAQ.html#Installation-of-source-packages
- Mac OS X R 错误“ld：警告：找不到选项的目录” https://stackoverflow.com/questions/35999874/mac-os-x-r-error-ld-warning-directory-not-found-for-option
- https://cran.r-project.org/doc/manuals/r-release/R-admin.html#Clang https://cran.r-project.org/doc/manuals/r-release/R-admin.html#Clang
- https://nistara.net/post/compile-issues-r/ https://nistara.net/post/compile-issues-r/
- 创建文件夹
/Users/YOURNAME/.R
- 创建文本文件
/Users/YOURNAME/.R/Makevars
- 将其放入该文件中：
FC = /usr/local/opt/gcc/bin/gfortran
F77 = /usr/local/opt/gcc/bin/gfortran
FLIBS = -L/usr/local/opt/gcc/lib
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